Use Rama’s Victory plugin. He added the detect HMD / HMD enumerator for us 
As far as VR settings / controls go:
Read ALL the blogs involving VR here: https://fatedblog.com/category/general/
VR Cheat sheet, namely the INI settings*: https://docs.unrealengine.com/latest/INT/Platforms/VR/ContentSetup/index.html
Mitch’s VR lab, watch all the videos: Mitch's VR Lab - YouTube
Epic’s Developing for VR, watch all the videos: Virtual Reality Development | Unreal Engine Documentation
Michael Abrash’s “Why VR is hard” video: http://www.gdcvault.com/play/1017797/Why-Virtual-Reality-Is-Hard
Other resources for UI development**:
Notes:
- : The value: r.compileshadersfordevelopment=0 may not work for you, it caused all of my materials to not compile correctly.
** : VR is the stuff of sci-fi / fantasy made real. Currently there are no better examples of UI design than what is shown in these shows.